I’ve summarised what’s happening.
Stopped recognising samsung ssd using usbc to usbc or usb to usbc. (Still works fine on laptop)
Tried several cables.
Samsung s21 ultra will not now connect properly. (As above works on laptop and have tried various cables)
Reads a flash usb
Reads a SSD and 31/2 drive in caddy using usba? Connector. (Although my bluetooth dongle used for mouse and keyboard does not work when drive plugged in)
Have checked and run all tests you asked
Question
Could the usb and usbc suddenly not now be getting enough power?
I assume if I by a powered usb hub that may solve the problem of not being able to read the Samsung ssd!
Still doesn’t solve the issue with the usb and usbc ports
Thanks very much for your patience
Bert